9.9 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
0.006 Low
EPSS
Percentile
79.4%
Any user who can edit their own user profile can execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. The following syntax, to be put, e.g., in the about section of the user profile, demonstrates a proof of concept:
{{html wiki="true"}}~{~{~/~h~t~m~l~}~}~ ~{~{~c~a~c~h~e~}~}~{~{~g~r~o~o~v~y~}~}~p~r~i~n~t~l~n~(~1~)~{~{~/~g~r~o~o~v~y~}~}~{~{~/~c~a~c~h~e~}~}~{{/html}}
While it would be expected that the above code is displayed just without the ~
, in fact just “1” is displayed, followed by a lot of raw HTML code. The same vulnerability can also be exploited in other contexts where the display
method on a document is used to display a field with wiki syntax, for example in applications created using App Within Minutes.
This has been patched in XWiki 13.10.11, 14.4.8, 14.10.2 and 15.0RC1.
There is no workaround apart from upgrading.
If you have any questions or comments about this advisory:
extensions.xwiki.org/xwiki/bin/view/Extension/App%20Within%20Minutes%20Application
github.com/advisories/GHSA-x764-ff8r-9hpx
github.com/xwiki/xwiki-platform/commit/0d547181389f7941e53291af940966413823f61c
github.com/xwiki/xwiki-platform/security/advisories/GHSA-x764-ff8r-9hpx
jira.xwiki.org/browse/XWIKI-20327
nvd.nist.gov/vuln/detail/CVE-2023-29523